A Non-Destructive Evaluation Strategy for Thick Coating Evaluation on Hemispherical Steel Shells of Different Sizes with a Wide-Range ECT Sensor

    Volume 41, Issue 4 (July 2013)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Published Online: 22 May 2013

    Page Count: 6


    Zhang, Dongli
    School of Information and Communication Engineering, North Univ. of China, Taiyuan,

    Wang, Zhaoba
    School of Information and Communication Engineering, North Univ. of China, Taiyuan,

    Chen, Zhenmao
    State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong Univ., Xi'an,

    Li, Yong
    State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong Univ., Xi'an,

    (Received 16 June 2012; accepted 12 December 2012)

    Abstract

    The goal of this paper is to develop an effective and high-precision method for thick coating evaluation in hemispherical steel shells of different sizes using eddy current technology. The key problems of the study include limited capability and low measure precision of eddy current sensor for long liftoff evaluation as well as the influence of shell thickness and curvature on liftoff-evaluation precision for coating in different size shells. To solve these problems, a wide-range sensor was proposed and the influence laws of shell sizes on signals were analyzed using a finite element method-boundary element method (FEM-BEM) hybrid program. Finally, a strategy using cubic spline interpolation method and sample database was adopted for thickness evaluation of coating in different size shells, and its applicability was validated by liftoff evaluation results.


    Paper ID: JTE20120206

    DOI: 10.1520/JTE20120206

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    Author
    Title A Non-Destructive Evaluation Strategy for Thick Coating Evaluation on Hemispherical Steel Shells of Different Sizes with a Wide-Range ECT Sensor
    Symposium , 0000-00-00
    Committee E07